ftsun® • microsystems Using the Network: Beginner's Guide . ------------~------.----- Part Number: 800-1711-10 Revision A, of 9 May 1988 Sun Workstation® and Sun Microsystems® are registered trademarks of Sun Microsystems, Inc. SunView™, SunOS™, Sun386iTM, and the combination of Sun with a numeric suffix are trademarks of Sun Microsystems, Inc. UNIX is a registered trademark of AT & T Bell Laboratories. All other products or services mentioned in this document are identified by the trademarks or service marks of their respective companies or organizations. Copyright © 1987, 1988 by Sun Microsystems, Inc. This publication is protected by Federal Copyright Law, with all rights reserved. No part of this publication may be reproduced, stored in a retrieval system, translated, transcribed, or transmitted, in any form, or by any means manual, electric, electronic, electro-magnetic, mechanical, chemical, optical, or other­ wise, without prior explicit written permission from Sun Microsystems. Contents Chapter 1 Overview ................................................................................................................ 3 1.1. What Is a Network? ........................................................................................................ 3 NFS ......................................................................................................................................... 3 The Yellow Pages ......................................................................................................... 6 Chapter 2 Login Access to Other Machines ........................................................ 11 2.1. Trust Amongst Machines on a Network ............................................................. 11 jete/hosts .............................................................................................................. 11 jete/hosts .equiv .......................................................................................... 12 2.2. Remote Login Witll r login ................................................................................. 13 Logging In to Another Machine With rlogin ....................................... 13 rlogin to a Machine Where You Don't Have a,Home Directory ............................................................................................................................ 13 rlogin to a Machine As Someone Else ..................................................... 14 r login to a Non-Existent Machine .............................................................. 14 Aborting an r login Connection ..................................................................... 14 Suspending an r 1 og in Connection 15 Verifying Your Identity with who am i 16 2.3. Remote Login Witll telnet ........................................... ,.i' .. ,.. ;':ii.... ~.;.;:;:;:;.:;;:" •., .. :, .. :.~:~ •.• ; •••;:::::: .. Logging In to a Machine Running Another ~.fJ:......... " ...... ~ ..t., ... Witll tel ne t .............................................................. ~.~;., .. ;;;:;:,;:.~ .. ;:i~~;:;:;·;, •• m>;; ••••••• @:i,.• ;~;:i;;" •..;::,::::::;:: t e lnet to a Non-Existent Machine ................ ,:;:;:;;.;i ••.• ~:;:;:;:;:;:: ••••• ;:;;:;:•.• ;,,+;:., ..... ;;:;;;;; Aborting a telnet Connection ..................................... ,..... :,: ....• ;.,,:;:;:.... ;.;+:,; •••. .:.:.:.;". Suspending a telnet Connection ........................................;,.;;",:, .. ;..:,,,, ... ,.......... 18 - iii- Contents - Continued Chapter 3 Mounting Remote Filesystems .............................................................. 23 3.1. The mount Command ............................................................................................... 23 3.2. The / ete/ f stab File ............................................................................................. 24 The umoun t Command ......................................................................................... 25 3.3. Options to mount and umount ........................................................................ 26 3.4. The Automounter ............................................................................................................. 27 3.5. Who's Mounting This System? showmount ............................................ 29 Chapter 4 Issuing Commands to Remote Machines ...................................... 33 4.1. Status InfOImation: ping, rup, and perfmeter .............................. 33 Dead or Alive: ping ............................................................................................... 33 Remote Uptime: rup ............................................................................................... 34 Perfonnance Meter: perfmeter .................................................................... 34 Remote User Infonnation With rusers ........................... ;......................... 35 The finger Command ......................................................................................... 36 4.2. Remote File Copy With rep and ftp ........................................................... 36 Copying from Another Machine to Your Machine Using rep ....... 37 Copying from Your Machine to Another Machine Using rep ....... 37 Copying Directories With rep ........................................................................... 38 Copying from Another Machine to Your Machine Using ft p ....... 38 Copying from Your Machine to Another Machine Using ftp ....... 39 4.3. Remote Command Execution With rsh ...................................................... '" 40 4.4. Network Error Notifications ...................................................................................... 41 Chapter 5 Using Dialup Terminals ............................................................................. 45 5.1. Equipment ............................................................................................................................ 45 5.2. Considerations ................................................................................................................... 45 Phone Number ................................................................................................................ 46 Baud Rate ...........................................................,............................................................... 46 5.3. The Process ......................................................................................................................... 46 5.4. Remote Login With tip .......................................................................................... 46 Establishing a Connection With tip .............................................................. 47 Problems Establishing a Connection With tip ....................................... 47 -iv- Contents - Continued Appendix A Command Summary ................................................................................. 51 Appendix B Glossary .............................................................................................................. 57 Index ....................................................................................................................................................... 61 -v- Tables Table 4-1 Network Error Notifications: Problems and Solutions ....................... 42 -vii- Figures Figure 1-1 A Non-Network Environment ......................................................................... 4 Figure 1-2 A Typical Network Set-Up ............................................................................... 5 Figure 2-1 An jete/hosts File ..................................................................................... 12 Figure 2-2 /ete/hosts. equiv File ............................................................................ 12 Figure 2-3 rlogin: Logging In to Another Machine ............................................. 13 Figure 2-4 rlogin: Logging In to a Machine Without a Home Directory ...................................................................................................................... 13 Figure 2-5 rlogin: Logging In to Another Machine With a Different Usemame .................................................................................................................... 14 Figure 2-6 r login: Logging In to a Non-Existent Machine .............................. 14 Figure 2-7 r login: Aborting a Connection ................................................................. 15 Figure 2-8 Aborting to an Intermediate r login ...................................................... 15 Figure 2-9 rlogin: Suspending a Connection ........................................................... 15 Figure 2-10 Discovering Your True Identity.................................................................. 16 Figure 2-11 telnet: Logging In to a Machine Running Another Operating System ................................................................................................ 17 Figure 2-12 telnet: Logging In to a Non-Existent Machine 17 Figure 2-13 telnet: Aborting a Connection 18 Figure 2-14 t e lne t: Suspending a Connection ........... ,',.:;:;:" ..... ;:.,.:.:.: ...... ;.,', .... .:"';;, ...... ,..,;;.;; Figure 3-1 Mounting Remote Filesystems .............................. ,:,:,:ii.·; ...,.·;:;:;·;·.;,; .. , •••·.:,:.:iii ............. ,,..<::,,. Figure 3-2 Mounting to A Different Directory ................................ ,~ ... ,';.:"', .... :;... : ... ,............. ,<"., Figure 3-3 Mounting to a Nonexistent